We can further enhance the example by programmatically setting a title attribute with "Doubleclick to open the link in a new window" value to all links in the content area. You can do that with the following code:

var link = editor.get_document().getElementsByTagName("A"); //get a reference to the links in the content area of RadEditor
for (var i = 0; i < link.length; i++)
{
link[i].setAttribute("title", "Double click to open the link in a new window");
}